Knee protector



FIG. 1 is a photograph of a front of a knee protector showing my new design;

FIG. 2 is a photograph of a right side of the knee protector shown in FIG. 1;

FIG. 3 is a photograph of a left side of the knee protector shown in FIG. 1;

FIG. 4 is a photograph of a rear of the knee protector shown in FIG. 1; and,

FIG. 5 is a is a photograph of a perspective right side of the knee protector shown in FIG. 1. 

The ornamental design for a knee protector, as shown and described. 